<template>
  <div>
    <!-- 评论列表 -->
    <div
      class="cmt-list"
      :class="isShowCmtInput ? 'art-cmt-container-2' : 'art-cmt-container-1'"
    >
      <van-list
        v-model="loading"
        :finished="finished"
        finished-text="没有更多了"
        @load="onLoad"
        offset="50"
        :immediate-check="false"
      >
        <!-- 评论的 Item 项 -->
        <div class="cmt-item" v-for="obj in commentList" :key="obj.com_id">
          <!-- 头部区域 -->
          <div class="cmt-header">
            <!-- 头部左侧 -->
            <div class="cmt-header-left">
              <img :src="obj.aut_photo" alt="" class="avatar" />
              <span class="uname">{{ obj.aut_name }}</span>
            </div>
            <!-- 头部右侧 -->
            <div class="cmt-header-right">
              <van-icon
                name="like"
                size="16"
                color="red"
                v-if="obj.is_liking === true"
                @click="loveFn(true, obj)"
              />
              <van-icon
                name="like-o"
                size="16"
                color="gray"
                v-else
                @click="loveFn(false, obj)"
              />
            </div>
          </div>
          <!-- 主体区域 -->
          <div class="cmt-body">
            {{ obj.content }}
          </div>
          <!-- 尾部区域 -->
          <div class="cmt-footer">{{ timeAgo(obj.pubdate) }}</div>
        </div>
      </van-list>
    </div>
    <!-- 发表评论的容器 -->
    <div>
      <!-- 底部添加评论区域 - 1 -->
      <div
        class="add-cmt-box van-hairline--top"
        v-if="isShowCmtInput === false"
      >
        <van-icon name="arrow-left" size="0.48rem" @click="$router.back()" />
        <div class="ipt-cmt-div" @click="isShowCmtInput = true">发表评论</div>
        <div class="icon-box">
          <van-badge :content="totalCount" max="99">
            <van-icon
              name="comment-o"
              size="0.53333334rem"
              @click="commentClickFn"
            />
          </van-badge>
          <van-icon name="star-o" size="0.53333334rem" />
          <van-icon name="share-o" size="0.53333334rem" @click="showShare = true"  />
        </div>
      </div>

      <!-- 底部添加评论区域 - 2 -->
      <div class="cmt-box van-hairline--top" v-else>
        <textarea
          placeholder="友善评论、理性发言、阳光心灵"
          v-fofo
          @blur="blurFn"
          v-model="context"
        ></textarea>
        <van-button
          type="default"
          :disabled="context.length >= 1 ? false : true"
          @click="sendFn()"
          >发布</van-button
        >
      </div>
    </div>
    <van-share-sheet
  v-model="showShare"
  title="立即分享给好友"
  :options="options"
  @select="onSelect"
/>
  </div>
</template>

<script>
import { timeAgo } from "@/utils/date.js";
import{mapMutations} from 'vuex'
import {
  commentsListAPI,
  commentLiKingAPI,
  commentDisLiKingAPI,
  sendCommentAPI,
} from "@/api";
export default {
  data() {
    return {
      offset: null, //偏移量评论默认id,
      commentList: [], //获取的评论列表
      isShowCmtInput: false,
      totalCount: 0, //总评论数量
      context: "", //输入框里面的数量
      loading: false, // 底部加载状态
      finished: false, // 底部是否加载完成
        options: [
         [
          { name: '微信', icon: 'wechat' },
          { name: '朋友圈', icon: 'wechat-moments' },
          { name: '微博', icon: 'weibo' },
          { name: 'QQ', icon: 'qq' },
        ],
        [
          { name: '复制链接', icon: 'link' },
          { name: '分享海报', icon: 'poster' },
          { name: '二维码', icon: 'qrcode' },
          { name: '小程序码', icon: 'weapp-qrcode' },
        ],
      ],
      showShare: false,
    };
  },
  async created() {
    const res = await commentsListAPI({
      id: this.$route.query.aid,
      offset: this.offset, // 把offset偏移量带给后台
    });
    // 判断是否还有数据
    if (res.data.data.results.length === 0) {
      this.finished = true;
    }
    this.commentList = [...this.commentList, ...res.data.data.results]; // 合并数据
    this.totalCount = res.data.data.total_count || ""; // 如果无评论数(0), 给空字符串(防止0微标出现)
    this.offset = res.data.data.last_id; // 保存起来为了做分页
    // 关闭加载状态
    this.loading = false;
  },
  methods: {
    timeAgo,
    async loveFn(bool, obj) {
      // 点在红心
      if (bool === true) {
        obj.is_liking = false;
        await commentDisLiKingAPI({ target: obj.com_id });
      } else {
        // 点在灰心
        console.log(obj);
        obj.is_liking = true;
        await commentLiKingAPI({ id: obj.com_id });
      }
    },
    commentClickFn() {
      // 第一种直接跳
      //  const articleHigiht = document.querySelector('.article-container').scrollHeight;
      // window.scrollTo(0,articleHigiht)

      // 真实DOM都在document(所以不再一个vue文件内), 也是可以获取的
      document.querySelector(".like-box").scrollIntoView({
        behavior: "smooth",
      });
    },
    blurFn() {
      setTimeout(() => {
        this.isShowCmtInput = true;
      });
    },
    async sendFn() {
      const res = await sendCommentAPI({
        artId: this.$route.query.aid,
        content: this.context,
      });
      // 保存新评论对象到数组中
      this.commentList.unshift(res.data.data.new_obj);
      // 数量+1
      this.totalCount++;
      // 成功后, 清除输入框内容
      this.context = "";
    },
    async onLoad() {
      if (this.commentList === 0) {
        this.loading = false;
        return;
      }

      const res = await commentsListAPI({
        id: this.$route.query.aid,
        offset: this.offset, // 把offset偏移量带给后台
      });
      // 判断是否还有数据
      if (res.data.data.results.length === 0) {
        this.finished = true;
      }
      this.commentList = [...this.commentList, ...res.data.data.results]; // 合并数据
      this.totalCount = res.data.data.total_count || ""; // 如果无评论数(0), 给空字符串(防止0微标出现)
      this.offset = res.data.data.last_id; // 保存起来为了做分页
      // 关闭加载状态
      this.loading = false;
    },
    onSelect(option) {
      Toast(option.name);
      this.showShare = false;
    },
  },
};
</script>

<style scoped lang="less">
.cmt-list {
  padding: 10px;
  .cmt-item {
    padding: 15px 0;
    + .cmt-item {
      border-top: 1px solid #f8f8f8;
    }
    .cmt-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      .cmt-header-left {
        display: flex;
        align-items: center;
        .avatar {
          width: 40px;
          height: 40px;
          background-color: #f8f8f8;
          border-radius: 50%;
          margin-right: 15px;
        }
        .uname {
          font-size: 12px;
        }
      }
    }
    .cmt-body {
      font-size: 14px;
      line-height: 28px;
      text-indent: 2em;
      margin-top: 6px;
      word-break: break-all;
    }
    .cmt-footer {
      font-size: 12px;
      color: gray;
      margin-top: 10px;
    }
  }
}
/*美化 - 文章详情 - 底部的评论页面 */
// 外层容器
.art-cmt-container-1 {
  padding-bottom: 46px;
}
.art-cmt-container-2 {
  padding-bottom: 80px;
}

// 发布评论的盒子 - 1
.add-cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  box-sizing: border-box;
  background-color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 46px;
  line-height: 46px;
  padding-left: 10px;
  .ipt-cmt-div {
    flex: 1;
    border: 1px solid #efefef;
    border-radius: 15px;
    height: 30px;
    font-size: 12px;
    line-height: 30px;
    padding-left: 15px;
    margin-left: 10px;
    background-color: #f8f8f8;
  }
  .icon-box {
    width: 40%;
    display: flex;
    justify-content: space-evenly;
    line-height: 0;
  }
}

.child {
  width: 20px;
  height: 20px;
  background: #f2f3f5;
}

// 发布评论的盒子 - 2
.cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  padding-left: 10px;
  box-sizing: border-box;
  background-color: white;
  textarea {
    flex: 1;
    height: 66%;
    border: 1px solid #efefef;
    background-color: #f8f8f8;
    resize: none;
    border-radius: 6px;
    padding: 5px;
  }
  .van-button {
    height: 100%;
    border: none;
  }
}
</style>